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+Contains query nodes that are commonly used by query parser implementations
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+Query Nodes
+
+The package org.apache.lucene.queryParser.nodes contains all the basic query nodes. The interface
+that represents a query node is {@link org.apache.lucene.queryParser.core.nodes.QueryNode}. Every query node must be serializable.
+
+
+{@link org.apache.lucene.queryParser.core.nodes.QueryNode}s are used by the text parser to create a syntax tree.
+These nodes are designed to be used by UI or other text parsers.
+The default Lucene text parser is {@link org.apache.lucene.queryParser.standard.parser.StandardSyntaxParser},
+it implements Lucene's standard syntax.
+
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+{@link org.apache.lucene.queryParser.core.nodes.QueryNode} interface should be implemented by all query nodes,
+the class {@link org.apache.lucene.queryParser.core.nodes.QueryNodeImpl} implements {@link org.apache.lucene.queryParser.core.nodes.QueryNode} and is extended
+by all current query node implementations.
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+A query node tree can be printed to the a stream, and it generates a pseudo XML representation
+with all the nodes.
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+A query node tree can also generate a query string that can be parsed back by the original text parser,
+at this point only the standard lucene syntax is supported.
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+Grouping nodes:
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+- AndQueryNode - used for AND operator
+- AnyQueryNode - used for ANY operator
+- OrQueryNode - used for OR operator
+- BooleanQueryNode - used when no operator is specified
+- ModifierQueryNode - used for modifier operator
+- GroupQueryNode - used for parenthesis
+- BoostQueryNode - used for boost operator
+- SlopQueryNode - phrase slop
+- FuzzyQueryNode - fuzzy node
+- ParametricRangeQueryNode - used for parametric field:[low_value TO high_value]
+- ProximityQueryNode - used for proximity search
+- NumericRangeQueryNode - used for numeric range search
+- TokenizedPhraseQueryNode - used by tokenizers/lemmatizers/analyzers for phrases/autophrases
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+Leaf Nodes:
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+- FieldQueryNode - field/value node
+- NumericQueryNode - used for numeric search
+- PathQueryNode - {@link org.apache.lucene.queryParser.core.nodes.QueryNode} object used with path-like queries
+- OpaqueQueryNode - Used as for part of the query that can be parsed by other parsers. schema/value
+- ParametricQueryNode - used for parametric field [>=|<=|=|<|>] value
+- PrefixWildcardQueryNode - non-phrase wildcard query
+- QuotedFieldQUeryNode - regular phrase node
+- WildcardQueryNode - non-phrase wildcard query
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+Utility Nodes:
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+- DeletedQueryNode - used by processors on optimizations
+- MatchAllDocsQueryNode - used by processors on optimizations
+- MatchNoDocsQueryNode - used by processors on optimizations
+- NoTokenFoundQueryNode - used by tokenizers/lemmatizers/analyzers
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